Why must the gas with the second uniform pressure drop in the adsorption tower be sent to the sequential venting buffer tank?
Thread Content
There are five adsorption towers; after achieving the first uniform pressure drop in one of them, the gas resulting from the second uniform pressure drop is sent to the buffer tank of the downstream device. Release the gas in the forward exhaust buffer tank to flush the bed of the reverse discharge tower. Question: Why is the gas with a uniform pressure drop for the second time in the absorption tower sent to the forward exhaust buffer tank? Is it because this portion of gas is the purest? Can gas with a uniform pressure drop, from the first or third time, be fed into the sequential venting buffer tank?
The main purpose of directing the gas with a uniformly reduced pressure from the adsorption tower for the second time into the counter-current purge buffer tank is to flush the bed in the counter-current adsorption tower. During the adsorption process, the adsorbent gradually becomes saturated and needs to be regenerated in order to restore its activity. A counter-current adsorption tower is a device used for regeneration once the adsorption tower becomes saturated. After an adsorption tower has undergone its first uniform pressure drop, the gases within it have been removed by the adsorbent, enabling the adsorbent to be regenerated. At this time, introducing the gas with a second uniform pressure drop into the sequential venting buffer tank, and by flushing the counter-current adsorption tower bed, it is possible to effectively remove waste gases and lower the temperature of the adsorption tower bed, thereby improving the regeneration efficiency of the adsorbent. As for why gas with the second uniform pressure drop was chosen to be placed in the sequential venting buffer tank rather than gas from other cycles, it may be because the gas from the second pressure drop has already had more contact with the adsorbent during the adsorption process, containing a higher concentration of waste gas components. Such a gas is more suitable for flushing the bed of a countercurrent adsorption tower, thereby achieving better regeneration results. In short, the purpose of introducing the gas with the second uniform pressure drop into the downstream buffer tank is to enhance the regeneration effect of the adsorbent by flushing the countercurrent adsorption bed. The reason for choosing this gas with the second uniform pressure drop is likely that it contains a higher concentration of waste gas components, making it more suitable for flushing the bed. .